When he and Barbara became suspicious of the 15-year-old girl, Susan, they went to investigate 76 Totter's Lane and discovered the First Doctor and his TARDIS inside a junkyard. He and Barbara were kidnapped by the Doctor inside his time and space ship and taken back to 100,000BC. Ian didn't believe that they had travelled in time at first, but soon came to believe when he and the other were chased by the Tribe of Gum and captured. However, he helped the others to escape and return to the TARDIS before the cavemen realised. (An Unearthly Child)